Android音频相关（四）设置铃声流程总结

本文主要介绍的是设置铃声的流程，在流程梳理清楚后解决问题也有大致的方向了。 一、要点概述 补充知识点： frameworks/base/packages/SettingProvider

本文主要介绍的是设置铃声的流程，在流程梳理清楚后解决问题也有大致的方向了。

一、要点概述

补充知识点：

frameworks/base/packages/SettingProvider/中的生成的数据库文件存储在data/system/users/userid(没有设置多用户userid则为0)。

在生成的Settings_system.xml数据库中记录着ringtone的信息和是否设置成功的ringtone_set值。

二、设置铃声流程

从安卓N开始，在设置铃声之后会拷贝一份到data/system_de/0/ringtones/ringtone_cache作为铃声的缓存文件(ringtone_cache是文件)，因此即使sd卡拔了。依然能播放之前在sd卡中设置的铃声。

当然了正常的铃声存储在data/system/users/0 下面的settings_system.xml文件中。

首先我们来研究一下铃声的ringtone_cache存储是如何实现的，当然了解这个对实现双卡铃声也是有帮助的。

frameworks/base/core/java/android/provider/Settings.java

/** {@hide} */

public static final String RINGTONE_CACHE = "ringtone_cache";

/** {@hide} */

public static final Uri RINGTONE_CACHE_URI = getUriFor(RINGTONE_CACHE);

.........

/**

* The content:// style URL for this table

*/

//content://settings/system/ringtone_cache

public static final Uri CONTENT_URI =

Uri.parse("content://" + AUTHORITY + "/system");

..........

/**

* Construct the content URI for a particular name/value pair,

* useful for monitoring changes with a ContentObserver.

* @param name to look up in the table

* @return the corresponding content URI, or null if not present

*/

public static Uri getUriFor(String name) {

if (MOVED_TO_SECURE.contains(name)) {

Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"

+ " to android.provider.Settings.Secure, returning Secure URI.");

return Secure.getUriFor(Secure.CONTENT_URI, name);

}

if (MOVED_TO_GLOBAL.contains(name) || MOVED_TO_SECURE_THEN_GLOBAL.contains(name)) {

Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"

+ " to android.provider.Settings.Global, returning read-only global URI.");

return Global.getUriFor(Global.CONTENT_URI, name);

}

return getUriFor(CONTENT_URI, name);

}

......

public static Uri getUriFor(Uri uri, String name) {

return Uri.withAppendedPath(uri, name);

}

1.注意是首次设置铃声会走到下面的方法中。（首次设置铃声流程）

frameworks/base/media/java/android/media/MediaScanner.java

这里需要注意 ringtones是扫描时，判断此文件是否是铃声资源文件。

下面要补充的是SettingUri是Settings数据库中的uri形式，ringtoneUri为当前铃声实际的uri。

Settings.System.DEFAULT_NOTIFICATION_URI----content://setting/system/notification_sound

Settings.System.DEFAULT_RINGTONE_URI------content://settings/system/ringtone

Settings.System.DEFAULT_ALARM_ALERT_URI-----content://settings/system/alarm_alert

注意在下面的方法里面会设置ringtone_set的值为1.

2.平时我们设置铃声调用的都是下面的方法

frameworks/base/media/java/android/media/RingtoneManager.java

/**

* Sets the {@link Uri} of the default sound for a given sound type.

*

* @param context A context used for querying.

* @param type The type whose default sound should be set. One of

* {@link #TYPE_RINGTONE}, {@link #TYPE_NOTIFICATION}, or

* {@link #TYPE_ALARM}.

* @param ringtoneUri A {@link Uri} pointing to the default sound to set.

* @see #getActualDefaultRingtoneUri(Context, int)

*/

public static void setActualDefaultRingtoneUri(Context context, int type, Uri ringtoneUri) {

String setting = getSettingForType(type);

if (setting == null) return;

final ContentResolver resolver = context.getContentResolver();

if (Settings.Secure.getIntForUser(resolver, Settings.Secure.SYNC_PARENT_SOUNDS, 0,

context.getUserId()) == 1) {

// Parent sound override is enabled. Disable it using the audio service.

disableSyncFromParent(context);

}

if(!isInternalRingtoneUri(ringtoneUri)) {

ringtoneUri = ContentProvider.maybeAddUserId(ringtoneUri, context.getUserId());

}

//将设置的内容写入Setting数据库

//adb shell settings get system [key](查询setting数据库底下的system表的【key】对应的value)

Settings.System.putStringForUser(resolver, setting,

ringtoneUri != null ? ringtoneUri.toString() : null, context.getUserId());

// Stream selected ringtone into cache so it's available for playback

// when CE storage is still locked

if (ringtoneUri != null) {

final Uri cacheUri = getCacheForType(type, context.getUserId());

try (InputStream in = openRingtone(context, ringtoneUri);

OutputStream out = resolver.openOutputStream(cacheUri)) {

//将铃声写入data/system_de/ringtones目录下

Streams.copy(in, out);

} catch (IOException e) {

Log.w(TAG, "Failed to cache ringtone: " + e);

}

}

}

/** {@hide} */

public static Uri getCacheForType(int type, int userId) {

if ((type & TYPE_RINGTONE) != 0) {

return ContentProvider.maybeAddUserId(Settings.System.RINGTONE_CACHE_URI, userId);

} else if ((type & TYPE_NOTIFICATION) != 0) {

return ContentProvider.maybeAddUserId(Settings.System.NOTIFICATION_SOUND_CACHE_URI,

userId);

} else if ((type & TYPE_ALARM) != 0) {

return ContentProvider.maybeAddUserId(Settings.System.ALARM_ALERT_CACHE_URI, userId);

}

//add by xiangzaixiansheng for support dual sim card ringtones @{

else if ((type & TYPE_RINGTONE_2) != 0) {

return ContentProvider.maybeAddUserId(Settings.System.RINGTONE_CACHE_URI_2, userId);

//}else if ((type & TYPE_MMS_NOTIFICATION) != 0) {

// return ContentProvider.maybeAddUserId(Settings.System.MMS_NOTIFICATION_SOUND_CACHE_URI, userId);

//add by xiangzaixiansheng for support dual sim card ringtones @}

}

return null;

}

三、播放在ringtone_cache中文件

/frameworks/base/media/java/android/media/MediaPlayer.java

这里面我们可以看见RingtoneManager类直接提供了两个方法可以获取URl

public void setDataSource(@NonNull Context context, @NonNull Uri uri,

@Nullable Map headers, @Nullable List cookies)

throws IOException {

if (context == null) {

throw new NullPointerException("context param can not be null.");

}

if (uri == null) {

throw new NullPointerException("uri param can not be null.");

}

if (cookies != null) {

CookieHandler cookieHandler = CookieHandler.getDefault();

if (cookieHandler != null && !(cookieHandler instanceof CookieManager)) {

throw new IllegalArgumentException("The cookie handler has to be of CookieManager "

+ "type when cookies are provided.");

}

}

// The context and URI usually belong to the calling user. Get a resolver for that user

// and strip out the userId from the URI if present.

final ContentResolver resolver = context.getContentResolver();

final String scheme = uri.getScheme();

final String authority = ContentProvider.getAuthorityWithoutUserId(uri.getAuthority());

/// M: If scheme is null, try to get path from uri and setDataSource with path.

if (scheme == null || ContentResolver.SCHEME_FILE.equals(scheme)) {

setDataSource(uri.getPath());

return;

} else if (ContentResolver.SCHEME_CONTENT.equals(scheme)

&& Settings.AUTHORITY.equals(authority)) {

// Try cached ringtone first since the actual provider may not be

// encryption aware, or it may be stored on CE media storage

final int type = RingtoneManager.getDefaultType(uri);

//获取铃声的两个URL

final Uri cacheUri = RingtoneManager.getCacheForType(type, context.getUserId());

final Uri actualUri = RingtoneManager.getActualDefaultRingtoneUri(context, type);

if (attemptDataSource(resolver, cacheUri)) {

return;

} else if (attemptDataSource(resolver, actualUri)) {

return;

} else {

setDataSource(uri.toString(), headers, cookies);

}

} else {

// Try requested Uri locally first, or fallback to media server

if (attemptDataSource(resolver, uri)) {

return;

} else {

setDataSource(uri.toString(), headers, cookies);

}

}

}

四、自定义铃声

1.铃声一般都放在

rameworks/base/data/sounds/

2.修改默认铃声的话，需要修改build/target/product/core_base.mk 和full_base.mk

PRODUCT_PROPERTY_OVERRIDES := \

ro.config.notification_sound=OnTheHunt.ogg \

ro.config.alarm_alert=Alarm_Classic.ogg

3.铃声增减都在mk文件中添加

frameworks/base/data/sounds/AllAudio.mk

五、问题分析

来电无声的问题分析

1.首先需要判断在data/system/users/0/settings_system.xml文件，搜索ringtone，查看ringtone_set和ringtone的值。

1) 若ringtone_set不是1，检查MediaScanner.java文件的endFile的方法。

adb shell settings get system ringtone_set 看值是否为1. （ alarm_alert_set 和 notification_sound_set ）

2),若ringtone未设置成功，检查setDefaultRingtoneFileNames（MediaScanner.java）和setRingtoneIfNotSet（MediaScanner.java）。

2，如何查看是否加载成功？

搜索setDataSource，加载成功的log如下：

MediaPlayerService: line:938 setDataSource fd=8 (/system/media/audio/ringtones/Ring_Synth_04.ogg), offset=0, length=576460752303423487

未有setDataSource，检查如下流程：

1）/vendor/mediatek/proprietary/packages/services/Telecomm/src/com/android/server/telecom/Ringer.java

startRinging

==>

2）/vendor/mediatek/proprietary/packages/services/Telecomm/src/com/android/server/telecom/AsyncRingtonePlayer.java

handlePlay

==>

3）/frameworks/base/media/java/android/media/Ringtone.java

play

==>

4）/frameworks/base/media/java/android/media/MediaPlayer.java

setDataSource

3，播放流程是否成功？

播放流程为：new mediaPlayer,setDataSource,prepare,start,搜索以上相关log，查看没有调用的原因。4，是否被静音？

1)播放音量是否为0?

如下表示铃声(stream type为2)的音量值index是14，若index为0，则调大音量测试

APM_AudioPolicyManager: startOutput() output 13, stream 2, session 289

AudioPolicyManagerCustomImpl: checkAndSetVolume stream = 2 index = 14 mId = 3 device = 0x2(0x2) delayMs = 0 force = 0 [1/0x2/14]

2）是否被mute？

搜索“mute”的关键字，如下被标示的log表示被铃声被mute，muted count>0，就标示被mute

APM::AudioPolicyManager: checkAndSetVolume() stream 2 muted count 1

check被静音的地方，加log:

1，/frameworks/base/services/core/java/com/android/server/audio/AudioService.java

1）， public static final boolean DEBUG_VOL = true;//将 Log.isLoggable(TAG + ".VOL", Log.DEBUG) || LOGD修改为true;

2），1180 private void adjustStreamVolume(int streamType, int direction, int flags,

1181 String callingPackage, String caller, int uid) {

1182 if (mUseFixedVolume) {

1183 return;

1184 }

1185 if (DEBUG_VOL) Log.d(TAG, "adjustStreamVolume() stream=" + streamType + ", dir=" + direction

1186 + ", flags=" + flags + ", caller=" + caller,new Exception("CallStack"));//add new Exception("CallStack")

2) ,/frameworks/av/services/audiopolicy/managerdefault/AudioPolicyManager.cpp

(1),#include //add

(2),5784void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,

5785 bool on,

5786 const sp& outputDesc,

5787 int delayMs,

5788 audio_devices_t device)

5789{

5790 const StreamDescriptor& streamDesc = mStreams.valueFor(stream);

5791 if (device == AUDIO_DEVICE_NONE) {

5792 device = outputDesc->device();

5793 }

5794

5795 ALOGD("setStreamMute() stream %d, mute %d, mMuteCount %d device %04x",

5796 stream, on, outputDesc->mMuteCount[stream], device);//change toALOGD

CallStack stack("CSXXX", 1); //add

5，抓取log方式的方式

首先清空mtklog文件夹

进入工模，Hardware Testing -- Audio -- Audio Logger

勾选

Audio Stream Output Dump

Audio Mixer Buffer Dump

Audio Track Buffer Dump

start log

复现问题

来电无声的时候添加adb命令

adb shell cat /sys/kernel/debug/mtksocaudio filename

adb shell cat /sys/kernel/debug/mtksocanaaudio filename

stop log